CST to BST Time Converter

Convert Central Standard Time (CST) to British Summer Time (BST). Both time zones are shown live below; current offset between them is 6 hours ahead.

Chicago · Central Standard Time
15:55:26
Sunday, May 10, 2026
CDT · UTC-05:00
London · British Summer Time
21:55:26
Sunday, May 10, 2026
GMT+1 · UTC+01:00

Convert a specific time

From: CST (Chicago)
To: BST (London)
--:--

Daylight Saving status right now

CST (Central Standard Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-11-01
Offset shift
UTC-05:00 → UTC-06:00
BST (British Summer Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-10-25
Offset shift
UTC+01:00 → UTC+00:00

When can CST and BST meet?

00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
CST
BST
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in Chicago (CST). Each row shows the local working-hours state in that zone for the same moment in time.
2 hours of overlap during standard 9am-5pm working hours.
Best meeting window: 09:00–10:00 CST (15:00–16:00 BST).

Hour-by-hour CST to BST conversion table

CST time (Chicago)BST time (London)Status
00:00 Sun06:00 SunOff-hours both sides
01:00 Sun07:00 SunOff-hours both sides
02:00 Sun08:00 SunOff-hours both sides
03:00 Sun09:00 SunBST working
04:00 Sun10:00 SunBST working
05:00 Sun11:00 SunBST working
06:00 Sun12:00 SunBST working
07:00 Sun13:00 SunBST working
08:00 Sun14:00 SunBST working
09:00 Sun15:00 SunBoth at work
10:00 Sun16:00 SunBoth at work
11:00 Sun17:00 SunCST working
12:00 Sun18:00 SunCST working
13:00 Sun19:00 SunCST working
14:00 Sun20:00 SunCST working
15:00 Sun21:00 SunCST working
16:00 Sun22:00 SunCST working
17:00 Sun23:00 SunOff-hours both sides
18:00 Sun00:00 MonOff-hours both sides
19:00 Sun01:00 MonOff-hours both sides
20:00 Sun02:00 MonOff-hours both sides
21:00 Sun03:00 MonOff-hours both sides
22:00 Sun04:00 MonOff-hours both sides
23:00 Sun05:00 MonOff-hours both sides

Times computed for today in each zone using the IANA time zone database. The conversion accounts for daylight saving time wherever applicable.

About these time zones

Central Standard Time (CST)
IANA identifier
America/Chicago
Current UTC offset
UTC-05:00
Current abbreviation
CDT
Major cities in this zone
ChicagoHoustonDallasAustinNew Orleans
British Summer Time (BST)
IANA identifier
Europe/London
Current UTC offset
UTC+01:00
Current abbreviation
GMT+1
Major cities in this zone
LondonManchesterEdinburghBirmingham

Sun today in Chicago and London

Chicago
Sunrise
05:37
Sunset
19:59
Solar noon
12:48
Daylight
14h 22m
London
Sunrise
05:18
Sunset
20:38
Solar noon
12:58
Daylight
15h 20m

Related converters

BST to CST (reverse)CST to ESTCST to PSTCST to GMTCST to UTCCST to CETEST to BSTPST to BSTGMT to BSTUTC to BSTCET to BST
Looking for local time? See time in Chicago or time in London.

Frequently asked questions

What is the time difference between CST and BST right now?+
BST (British Summer Time) is currently 6 hours ahead CST (Central Standard Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does CST or BST observe daylight saving time?+
CST: observes daylight saving time. BST: observes daylight saving time.
When is the best time to schedule a meeting between CST and BST?+
The strongest overlap is 09:00–10:00 CST (15:00–16:00 BST), giving 2 hours when both sides are within standard 9am-5pm working hours.
What time is it in London when it is 12:00 noon in Chicago?+
When it is 12:00 Sun in Chicago (CST), it is 18:00 Sun in London (BST).
Which IANA time zone identifiers are used for CST and BST?+
CST maps to "America/Chicago" in the IANA database. BST maps to "Europe/London". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is Chicago ahead of or behind London?+
Whether Chicago (CST) is ahead of or behind London (BST) depends on the current UTC offsets. Right now BST is 6 hours ahead CST. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for CST and BST?+
CST is UTC-05:00 (CDT) and BST is UTC+01:00 (GMT+1). Both offsets shift by one hour when the corresponding region enters or exits daylight saving time, so the live values on this page are the source of truth.
Can I schedule meetings during business hours for both CST and BST?+
Yes. There are 2 hours of overlap during standard 9am-5pm working hours, with the strongest window at 09:00–10:00 CST.